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1. In which motor no-load to full-load difference is lowest (a) series motor (b) shunt motor (c) Compound motor 2. In a 60Hz induction motor full load speed is 850 rpm then what is the Synchronous speed. (a) 900 rpm (b) 950 rpm (c) 1600 rpm. 3. Input impedence of MOSFET is _______________ 4. Why capacitance is shown as a Shunt element in analysis of transmission line (a) it is between Conductor & earth (b) because Admittance is used for calculation of capacitive reactance 5. Increased rotor resistance in rotor ckt of induction motor is related with (a) high starting torque (b) more speed variation 6. Total no of strands in a acsr conductor is 81, then what is the no. of conductor in its outer layer (a)36 (b)18 (c)24 7. A R-C ckt , supplied with DC, a bulb is connected across the Capacitor, then what happens to the illumination, if we change the capacitance. Answer : No change at all 8. After rain what happens to Insulator (a) break-down strength of Insulator decreases (b)Arch length reduces 9. In electro-dynamometer A,meter & wattmeter the type of scale is ____________ Answer : Non-uniform 10. Megger is used for the measurement of (a) Insulation resistance (b) Conductor resistance 11. Insulation used in transformer ___________leakage flux. (a) increases (b) decreases 12. In a L-R ckt energy lost = 2000 W, energy conserved = 500W, then what is the time constant Answer : time constant = L/R = 0.5 13. In a R-L ckt a ac voltage is applied , such that instantaneous power is negative for 2ms, then what will be the power factor. (a) 9 deg (b) 18 deg (c) 36 Deg 14. Voltage & current in a ckt is given by V= V1+j V2 and I= I1 +j I2, then rms power is _______________ 15. An AC voltage of 50Hz is impressed in a resistive ckt, the oscillating power has a frequency (a) 50 Hz (b) 100 (c) no oscillating power is there in resistive ckt
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